STUTTGART, Germany (AP) Sixth-seeded Philipp Kohlschreiber beat Alexandr Dolgopolov 6-3, 6-3 on Monday to ease into the second round of the Mercedes Cup.
It was the only completed match of the day as heavy rain delayed start of play for several hours and the meeting between Viktor Troicki and Borna Coric was postponed until Tuesday.
The tournament is being played on grass for the first time and is a build-up for Wimbledon.
Rafael Nadal is top-seeded in the event, which also features Feliciano Lopez, Gael Monfils and Marin Cilic.
They all had a bye into the second round.